Add NIS support to getservent(3) functions (getservbyport() and getservbyname()

both call getservent() to do most of the work, so we only need to modify
this file to take care of everybody).

Note that there is only one NIS services map (services.byname) even
though there are getservbyname() and getservbyport() library functions.

1 files changed, 68 insertions, 0 deletions

diff --git a/lib/libc/net/getservent.c b/lib/libc/net/getservent.c
index 6bee5d3..9fb47b6 100644
--- a/lib/libc/net/getservent.c
+++ b/lib/libc/net/getservent.c
@@ -41,6 +41,12 @@ static char sccsid[] = "@(#)getservent.c	8.1 (Berkeley) 6/4/93";
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
+#ifdef YP
+#include <rpc/rpc.h>
+#include <rpcsvc/yp_prot.h>
+#include <rpcsvc/ypclnt.h>
+static int serv_stepping_yp = 0;
+#endif
 
 #define	MAXALIASES	35
 
@@ -50,6 +56,54 @@ static struct servent serv;
 static char *serv_aliases[MAXALIASES];
 int _serv_stayopen;
 
+#ifdef YP
+static int
+_getypservent(line)
+	char *line;
+{
+	static char *key = NULL;
+	static int keylen;
+	static char *yp_domain = NULL;
+	char *lastkey, *result;
+	int resultlen;
+	int rv;
+
+	if(!yp_domain) {
+		if(yp_get_default_domain(&yp_domain))
+			return (0);
+	}
+
+	if (!serv_stepping_yp) {
+		if (key)
+			free(key);
+		if ((rv = yp_first(yp_domain, "services.byname", &key, &keylen,
+			     &result, &resultlen))) {
+			free(result);
+			serv_stepping_yp = 0;
+			return(0);
+		}
+		serv_stepping_yp = 1;
+	} else {
+		lastkey = key;
+		rv = yp_next(yp_domain, "services.byname", key, keylen, &key,
+			     &keylen, &result, &resultlen);
+		free(lastkey);
+		if (rv) {
+			serv_stepping_yp = 0;
+			return (0);
+		}
+	}
+
+	strncpy(line, result, BUFSIZ - 1);
+	/* getservent() expects lines terminated with \n -- make it happy */
+	strcat(line, "\n");
+
+	free(result);
+
+	return(1);
+}
+#endif
+
 void
 setservent(f)
 	int f;
@@ -77,11 +131,25 @@ getservent()
 	char *p;
 	register char *cp, **q;
 
+#ifdef YP
+	if (serv_stepping_yp && _getypservent(line)) {
+		p = (char *)&line;
+		goto unpack;
+	}
+tryagain:
+#endif
 	if (servf == NULL && (servf = fopen(_PATH_SERVICES, "r" )) == NULL)
 		return (NULL);
 again:
 	if ((p = fgets(line, BUFSIZ, servf)) == NULL)
 		return (NULL);
+#ifdef YP
+	if (*p == '+') {
+		if (!_getypservent(&line))
+			goto tryagain;
+	}
+unpack:
+#endif
 	if (*p == '#')
 		goto again;
 	cp = strpbrk(p, "#\n");